org.datanucleus.enhancement

Interface StateManager

All Known Implementing Classes:

ReferentialStateManagerImpl, StateManagerImpl

public interface StateManager

This interface is the point of contact between managed instances of Persistable classes and DataNucleus. It contains the methods used by Persistable instances to delegate behavior to DataNucleus.

Each managed Persistable instance contains a reference to a StateManager. A StateManager might manage one or multiple instances of Persistable instances.

Method Summary

Modifier and Type	Method and Description
boolean	getBooleanField(Persistable pc, int field, boolean currentValue) Return the value for the field.
byte	getByteField(Persistable pc, int field, byte currentValue) Return the value for the field.
char	getCharField(Persistable pc, int field, char currentValue) Return the value for the field.
double	getDoubleField(Persistable pc, int field, double currentValue) Return the value for the field.
ExecutionContextReference	getExecutionContext(Persistable pc) Return the ExecutionContext that owns this instance.
float	getFloatField(Persistable pc, int field, float currentValue) Return the value for the field.
int	getIntField(Persistable pc, int field, int currentValue) Return the value for the field.
long	getLongField(Persistable pc, int field, long currentValue) Return the value for the field.
Object	getObjectField(Persistable pc, int field, Object currentValue) Return the value for the field.
Object	getObjectId(Persistable pc) Return the object representing the identity of the calling instance.
short	getShortField(Persistable pc, int field, short currentValue) Return the value for the field.
String	getStringField(Persistable pc, int field, String currentValue) Return the value for the field.
Object	getTransactionalObjectId(Persistable pc) Return the object representing the identity of the calling instance.
Object	getVersion(Persistable pc) Return the object representing the version of the calling instance.
boolean	isDeleted(Persistable pc) Tests whether this object has been deleted.
boolean	isDirty(Persistable pc) Tests whether this object is dirty.
boolean	isLoaded(Persistable pc, int field) Return true if the field is cached in the calling instance.
boolean	isNew(Persistable pc) Tests whether this object has been newly made persistent.
boolean	isPersistent(Persistable pc) Tests whether this object is persistent.
boolean	isTransactional(Persistable pc) Tests whether this object is transactional.
void	makeDirty(Persistable pc, String fieldName) Mark the associated Persistable field dirty.
void	preSerialize(Persistable pc) Guarantee that the serializable transactional and persistent fields are loaded into the instance.
void	providedBooleanField(Persistable pc, int field, boolean currentValue) The value of the field requested to be provided to the StateManager.
void	providedByteField(Persistable pc, int field, byte currentValue) The value of the field requested to be provided to the StateManager.
void	providedCharField(Persistable pc, int field, char currentValue) The value of the field requested to be provided to the StateManager.
void	providedDoubleField(Persistable pc, int field, double currentValue) The value of the field requested to be provided to the StateManager.
void	providedFloatField(Persistable pc, int field, float currentValue) The value of the field requested to be provided to the StateManager.
void	providedIntField(Persistable pc, int field, int currentValue) The value of the field requested to be provided to the StateManager.
void	providedLongField(Persistable pc, int field, long currentValue) The value of the field requested to be provided to the StateManager.
void	providedObjectField(Persistable pc, int field, Object currentValue) The value of the field requested to be provided to the StateManager.
void	providedShortField(Persistable pc, int field, short currentValue) The value of the field requested to be provided to the StateManager.
void	providedStringField(Persistable pc, int field, String currentValue) The value of the field requested to be provided to the StateManager.
boolean	replacingBooleanField(Persistable pc, int field) The replacement value of the field in the calling instance.
byte	replacingByteField(Persistable pc, int field) The replacement value of the field in the calling instance.
char	replacingCharField(Persistable pc, int field) The replacement value of the field in the calling instance.
Object[]	replacingDetachedState(Detachable pc, Object[] state) The replacement value of the detached state in the calling instance.
double	replacingDoubleField(Persistable pc, int field) The replacement value of the field in the calling instance.
byte	replacingFlags(Persistable pc) The owning StateManager uses this method to supply the value of the flags to the Persistable instance.
float	replacingFloatField(Persistable pc, int field) The replacement value of the field in the calling instance.
int	replacingIntField(Persistable pc, int field) The replacement value of the field in the calling instance.
long	replacingLongField(Persistable pc, int field) The replacement value of the field in the calling instance.
Object	replacingObjectField(Persistable pc, int field) The replacement value of the field in the calling instance.
short	replacingShortField(Persistable pc, int field) The replacement value of the field in the calling instance.
StateManager	replacingStateManager(Persistable pc, StateManager sm) Replace the current value of dnStateManager.
String	replacingStringField(Persistable pc, int field) The replacement value of the field in the calling instance.
void	setBooleanField(Persistable pc, int field, boolean currentValue, boolean newValue) Mark the field as modified by the user.
void	setByteField(Persistable pc, int field, byte currentValue, byte newValue) Mark the field as modified by the user.
void	setCharField(Persistable pc, int field, char currentValue, char newValue) Mark the field as modified by the user.
void	setDoubleField(Persistable pc, int field, double currentValue, double newValue) Mark the field as modified by the user.
void	setFloatField(Persistable pc, int field, float currentValue, float newValue) Mark the field as modified by the user.
void	setIntField(Persistable pc, int field, int currentValue, int newValue) Mark the field as modified by the user.
void	setLongField(Persistable pc, int field, long currentValue, long newValue) Mark the field as modified by the user.
void	setObjectField(Persistable pc, int field, Object currentValue, Object newValue) Mark the field as modified by the user.
void	setShortField(Persistable pc, int field, short currentValue, short newValue) Mark the field as modified by the user.
void	setStringField(Persistable pc, int field, String currentValue, String newValue) Mark the field as modified by the user.

Method Detail

getExecutionContext

ExecutionContextReference getExecutionContext(Persistable pc)

Return the ExecutionContext that owns this instance.

Parameters:

pc - the calling Persistable instance

Returns:

the ExecutionContext that owns this instance

replacingFlags

byte replacingFlags(Persistable pc)

The owning StateManager uses this method to supply the value of the flags to the Persistable instance.

Parameters:

pc - the calling Persistable instance

Returns:

the value of dnFlags to be stored in the Persistable instance

replacingStateManager

StateManager replacingStateManager(Persistable pc,
                                   StateManager sm)

Replace the current value of dnStateManager.

This method is called by the Persistable whenever dnReplaceStateManager is called and there is already an owning StateManager. This is a security precaution to ensure that the owning StateManager is the only source of any change to its reference in the Persistable.

Parameters:

pc - the calling Persistable instance

sm - the proposed new value for the dnStateManager

Returns:

the new value for the dnStateManager

isDirty

boolean isDirty(Persistable pc)

Tests whether this object is dirty. Instances that have been modified, deleted, or newly made persistent in the current transaction return true.

Transient nontransactional instances return false.

Parameters:

pc - the calling Persistable instance

Returns:

true if this instance has been modified in the current transaction.

See Also:

Persistable.dnMakeDirty(String fieldName)

isTransactional

boolean isTransactional(Persistable pc)

Tests whether this object is transactional. Instances that respect transaction boundaries return true. These instances include transient instances made transactional as a result of being the target of a makeTransactional method call; newly made persistent or deleted persistent instances; persistent instances read in data store transactions; and persistent instances modified in optimistic transactions.

Transient nontransactional instances return false.

Parameters:

pc - the calling Persistable instance

Returns:

true if this instance is transactional.

isPersistent

boolean isPersistent(Persistable pc)

Tests whether this object is persistent. Instances whose state is stored in the data store return true.

Transient instances return false.

Parameters:

pc - the calling Persistable instance

Returns:

true if this instance is persistent.

isNew

boolean isNew(Persistable pc)

Tests whether this object has been newly made persistent. Instances that have been made persistent in the current transaction return true.

Transient instances return false.

Parameters:

pc - the calling Persistable instance

Returns:

true if this instance was made persistent in the current transaction.

isDeleted

boolean isDeleted(Persistable pc)

Tests whether this object has been deleted. Instances that have been deleted in the current transaction return true.

Transient instances return false.

Parameters:

pc - the calling Persistable instance

Returns:

true if this instance was deleted in the current transaction.

makeDirty

void makeDirty(Persistable pc,
               String fieldName)

Mark the associated Persistable field dirty.

The StateManager will make a copy of the field so it can be restored if needed later, and then mark the field as modified in the current transaction.

Parameters:

pc - the calling Persistable instance

fieldName - the name of the field

getObjectId

Object getObjectId(Persistable pc)

Return the object representing the identity of the calling instance. If the identity is being changed in the current transaction, this method returns the identity as of the beginning of the transaction.

Parameters:

pc - the calling Persistable instance

Returns:

the object representing the identity of the calling instance

getTransactionalObjectId

Object getTransactionalObjectId(Persistable pc)

Return the object representing the identity of the calling instance. If the identity is being changed in the current transaction, this method returns the current identity as changed in the transaction.

Parameters:

pc - the calling Persistable instance

Returns:

the object representing the identity of the calling instance

getVersion

Object getVersion(Persistable pc)

Return the object representing the version of the calling instance.

Parameters:

pc - the calling Persistable instance

Returns:

the object representing the version of the calling instance

isLoaded

boolean isLoaded(Persistable pc,
                 int field)

Return true if the field is cached in the calling instance.

Parameters:

pc - the calling Persistable instance

field - the field number

Returns:

whether the field is cached in the calling instance

preSerialize

void preSerialize(Persistable pc)

Guarantee that the serializable transactional and persistent fields are loaded into the instance. This method is called by the generated dnPreSerialize method prior to serialization of the instance.

Parameters:

pc - the calling Persistable instance

getBooleanField

boolean getBooleanField(Persistable pc,
                        int field,
                        boolean currentValue)

Return the value for the field.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

Returns:

the new value for the field

getCharField

char getCharField(Persistable pc,
                  int field,
                  char currentValue)

Return the value for the field.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

Returns:

the new value for the field

getByteField

byte getByteField(Persistable pc,
                  int field,
                  byte currentValue)

Return the value for the field.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

Returns:

the new value for the field

getShortField

short getShortField(Persistable pc,
                    int field,
                    short currentValue)

Return the value for the field.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

Returns:

the new value for the field

getIntField

int getIntField(Persistable pc,
                int field,
                int currentValue)

Return the value for the field.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

Returns:

the new value for the field

getLongField

long getLongField(Persistable pc,
                  int field,
                  long currentValue)

Return the value for the field.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

Returns:

the new value for the field

getFloatField

float getFloatField(Persistable pc,
                    int field,
                    float currentValue)

Return the value for the field.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

Returns:

the new value for the field

getDoubleField

double getDoubleField(Persistable pc,
                      int field,
                      double currentValue)

Return the value for the field.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

Returns:

the new value for the field

getStringField

String getStringField(Persistable pc,
                      int field,
                      String currentValue)

Return the value for the field.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

Returns:

the new value for the field

getObjectField

Object getObjectField(Persistable pc,
                      int field,
                      Object currentValue)

Return the value for the field.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

Returns:

the new value for the field

setBooleanField

void setBooleanField(Persistable pc,
                     int field,
                     boolean currentValue,
                     boolean newValue)

Mark the field as modified by the user.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

newValue - the proposed new value of the field

setCharField

void setCharField(Persistable pc,
                  int field,
                  char currentValue,
                  char newValue)

Mark the field as modified by the user.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

newValue - the proposed new value of the field

setByteField

void setByteField(Persistable pc,
                  int field,
                  byte currentValue,
                  byte newValue)

Mark the field as modified by the user.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

newValue - the proposed new value of the field

setShortField

void setShortField(Persistable pc,
                   int field,
                   short currentValue,
                   short newValue)

Mark the field as modified by the user.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

newValue - the proposed new value of the field

setIntField

void setIntField(Persistable pc,
                 int field,
                 int currentValue,
                 int newValue)

Mark the field as modified by the user.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

newValue - the proposed new value of the field

setLongField

void setLongField(Persistable pc,
                  int field,
                  long currentValue,
                  long newValue)

Mark the field as modified by the user.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

newValue - the proposed new value of the field

setFloatField

void setFloatField(Persistable pc,
                   int field,
                   float currentValue,
                   float newValue)

Mark the field as modified by the user.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

newValue - the proposed new value of the field

setDoubleField

void setDoubleField(Persistable pc,
                    int field,
                    double currentValue,
                    double newValue)

Mark the field as modified by the user.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

newValue - the proposed new value of the field

setStringField

void setStringField(Persistable pc,
                    int field,
                    String currentValue,
                    String newValue)

Mark the field as modified by the user.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

newValue - the proposed new value of the field

setObjectField

void setObjectField(Persistable pc,
                    int field,
                    Object currentValue,
                    Object newValue)

Mark the field as modified by the user.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

newValue - the proposed new value of the field

providedBooleanField

void providedBooleanField(Persistable pc,
                          int field,
                          boolean currentValue)

The value of the field requested to be provided to the StateManager.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

providedCharField

void providedCharField(Persistable pc,
                       int field,
                       char currentValue)

The value of the field requested to be provided to the StateManager.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

providedByteField

void providedByteField(Persistable pc,
                       int field,
                       byte currentValue)

The value of the field requested to be provided to the StateManager.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

providedShortField

void providedShortField(Persistable pc,
                        int field,
                        short currentValue)

The value of the field requested to be provided to the StateManager.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

providedIntField

void providedIntField(Persistable pc,
                      int field,
                      int currentValue)

The value of the field requested to be provided to the StateManager.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

providedLongField

void providedLongField(Persistable pc,
                       int field,
                       long currentValue)

The value of the field requested to be provided to the StateManager.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

providedFloatField

void providedFloatField(Persistable pc,
                        int field,
                        float currentValue)

The value of the field requested to be provided to the StateManager.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

providedDoubleField

void providedDoubleField(Persistable pc,
                         int field,
                         double currentValue)

The value of the field requested to be provided to the StateManager.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

providedStringField

void providedStringField(Persistable pc,
                         int field,
                         String currentValue)

The value of the field requested to be provided to the StateManager.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

providedObjectField

void providedObjectField(Persistable pc,
                         int field,
                         Object currentValue)

The value of the field requested to be provided to the StateManager.

Parameters:

pc - the calling Persistable instance

field - the field number

currentValue - the current value of the field

replacingBooleanField

boolean replacingBooleanField(Persistable pc,
                              int field)

The replacement value of the field in the calling instance.

Parameters:

pc - the calling Persistable instance

field - the field number

Returns:

the new value for the field

replacingCharField

char replacingCharField(Persistable pc,
                        int field)

The replacement value of the field in the calling instance.

Parameters:

pc - the calling Persistable instance

field - the field number

Returns:

the new value for the field

replacingByteField

byte replacingByteField(Persistable pc,
                        int field)

The replacement value of the field in the calling instance.

Parameters:

pc - the calling Persistable instance

field - the field number

Returns:

the new value for the field

replacingShortField

short replacingShortField(Persistable pc,
                          int field)

The replacement value of the field in the calling instance.

Parameters:

pc - the calling Persistable instance

field - the field number

Returns:

the new value for the field

replacingIntField

int replacingIntField(Persistable pc,
                      int field)

The replacement value of the field in the calling instance.

Parameters:

pc - the calling Persistable instance

field - the field number

Returns:

the new value for the field

replacingLongField

long replacingLongField(Persistable pc,
                        int field)

The replacement value of the field in the calling instance.

Parameters:

pc - the calling Persistable instance

field - the field number

Returns:

the new value for the field

replacingFloatField

float replacingFloatField(Persistable pc,
                          int field)

The replacement value of the field in the calling instance.

Parameters:

pc - the calling Persistable instance

field - the field number

Returns:

the new value for the field

replacingDoubleField

double replacingDoubleField(Persistable pc,
                            int field)

The replacement value of the field in the calling instance.

Parameters:

pc - the calling Persistable instance

field - the field number

Returns:

the new value for the field

replacingStringField

String replacingStringField(Persistable pc,
                            int field)

The replacement value of the field in the calling instance.

Parameters:

pc - the calling Persistable instance

field - the field number

Returns:

the new value for the field

replacingObjectField

Object replacingObjectField(Persistable pc,
                            int field)

The replacement value of the field in the calling instance.

Parameters:

pc - the calling Persistable instance

field - the field number

Returns:

the new value for the field

replacingDetachedState

Object[] replacingDetachedState(Detachable pc,
                                Object[] state)

The replacement value of the detached state in the calling instance.

Parameters:

pc - the calling Detachable instance

state - the current value of the detached state

Returns:

the replacement value for the detached state